Constant zebra_chain::transaction::serialize::MIN_TRANSPARENT_INPUT_SIZE

pub(crate) const MIN_TRANSPARENT_INPUT_SIZE: u64 = _; // 41u64

A Tx Input must have an Outpoint (32 byte hash + 4 byte index), a 4 byte sequence number, and a signature script, which always takes a min of 1 byte (for a length 0 script).